The end of the Raiders’ tenure in Oakland was a much-discussed topic this week.

Just not among the Raiders.

On Friday, head coach Jon Gruden said the likelihood of Sunday being the last game the Raiders play at the Coliseum before moving to Las Vegas next season had “not really” been a part of the team’s preparation for playing the Jaguars.

“At the end of the game we’ll show our respects, no doubt,” Gruden said. “But we’ve got to get ready to play a good football team. … Nobody gives you anything in this league. So, we’ve got to play better football and we’ve got to concentrate on getting a win.”

Their playoff hopes all but extinguished by a three-game losing streak, the Raiders had plenty of issues to address before hosting the Jaguars, who are riding their own five-game losing skid.

Chief among them, Gruden said this week: “We’ve got to find our identity on defense.”

Since the arrival of Gruden and defensive coordinator Paul Guenther last season, the Associated Press noted, the Raiders have allowed averages of 28.7 points per game and 6.21 yards per play — ranking 31st and 32nd in the league in that span.

Last week, the defense allowed 552 total yards in a loss to the Titans, the fourth-highest total in franchise history. Asked Thursday how he handled the performance with players, Guenther said he is “always hard on our guys … but I’m also realistic on some things.”

“We have some different moving pieces in there,” Guenther said. “Some new guys were thrown in some spots they haven’t played in a while. Some guys that had been here for a couple weeks didn’t play nearly at the level I hoped.”

One recent arrival, D.J. Swearinger, was waived on Tuesday, continuing the Raiders’ turnover at safety. Guenther implied losses at safety and middle linebacker — key on-field communicators — have affected how much of the defensive system can be used.

“When you have a lot of different guys in there that have to be on the same page as far as the checks and formations, that becomes difficult,” Guenther said. “You’ve got to try to keep them up to speed. You’re at a dilemma where, do you keep it simple and let them play, or are you able to do a little bit more and hopefully they can understand it when things are moving?”

Guenther said he has leaned toward the former approach.

Jaguars (4-9) at Raiders (6-7)

Spotlight on: Quarterback Derek Carr. Raiders fans booed Carr and the offense a few times last Sunday in a loss to the Titans. That wouldn’t happen again in the Raiders’ likely final game in Oakland — would it? Some of Carr’s best moments in six seasons have come at the Coliseum: fourth-quarter comebacks, a 12-win season in 2016. When things have gone badly, though, no player arguably has fielded more criticism. Fair or not, Carr’s future in Las Vegas figures to be a topic of debate again this offseason. Can he leave Oakland on a high note?

Flags could fly in this matchup of the league’s two most penalized teams. The Jaguars lead the league in penalties (115) and penalty yards (1,015). The Raiders rank 31st in penalties (107) and 29th in yardage (933).

The Jaguars are 2-12 all time in West Coast games and haven’t won one since their 2004 season finale — in Oakland. The Jaguars’ other West Coast win also came at the Coliseum, in 1997.

Rookie defensive end Josh Allen, who was passed up by the Raiders at No. 4 overall and picked by the Jaguars at No. 7, leads all NFL rookies with nine sacks. Clelin Ferrell, who was drafted at No. 4 by the Raiders, has 3.5 sacks.

— Matt Kawahara

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“I’ve tried to keep it a little bit more simple, more dialed back than I normally have done things in years past,” he said. “A lot of times you want to let these guys just … play sound, stay on top in the coverage, play good in the run fits and let them go.”

Staying “on top” in pass coverage was a particular issue last Sunday, when the Titans recorded seven passing plays of 20-plus yards. The Raiders have allowed 63 such plays this season, most in the NFL. Guenther said the Raiders too often ceded “leverage” against the Titans’ receivers.

“When a team’s able to run the ball like they did and also work play action, it becomes difficult on some things,” Guenther said. “But you know, there’s no excuse. We just didn’t play good enough at any level of the defense. … We’ve got to play a lot better and that’s what I expect.”

While the Jaguars rank 16th in total offense, they’ve averaged just 11.4 points and 71.4 rushing yards during their five-game losing streak. Still, they feature a physical running back in Leonard Fournette (1,039 rushing yards) and last week handed their offense back to rookie quarterback Gardner Minshew II, who went 4-4 earlier in the season filling in for injured Nick Foles.

“He’ll move around in the pocket a lot, he’s an accurate passer,” Guenther said. “They’ve got the big back (Fournette) back there, so having to defend the run and the pass with (Minshew) scrambling around becomes a very challenging thing.”

Jaguars head coach Doug Marrone said he tried to prepare players this week for what he thinks will be a charged atmosphere at the Coliseum.

“We’ve talked about it,” Marrone said on a conference call. “I think it will be an emotional day for a lot of people there.”

Gruden said Friday he would have liked to spend more time this week recognizing the Raiders’ time in Oakland.

“I wish I had time to stand up here and thank all the fans,” Gruden said. “We’ll try to give you one hell of a show.”